Combination terminal block and lightning-arrester



R. CONNELL. COMBINATION TERMINAL BLOCK AND LIGHTNING ABRESTER.

7 APPLICATION FILED JUNE 20, I9I9- 1,328,720, Patented Jan. 20, 1920.

To all whom-it may concern:

'noY coNNnLL, or BUFFALO,

new Yjonx.

COMBINATION TERMINAL BLOCK AND LIGHTNING-ARRESTER.

Application filed June Be it known that I, ROY CoNNnLL, zen of theUnited States, and resident of Buffalo, in the'county of Erie and Stateof New York, have invented a certain new and useful Combination TerminalBlock and Lightning-Arrester of which the 01- I lowing is aspecification.

This invention relates to a combination terminal block and lightningarrester.

' The object of the invention resides in so constructing the device thatit will operate as. an ordinary but will permit tential discharges thegrounding of high poto protect the circuit in I which it isinterpolated.

' relation to each I accomplish this object broadly by interposing aresistance element of carborundum or the like between the two bindingposts of the "terminal block, using one of the binding osts for theconnection to the line and to the relay and grounding the other bindinpost. o v

Furt ermore, the carborundum resist ance element is interposed betweenthe binding posts in such manner that it may be readily applied and sothat it will notinterfere with the.normal function of the binding posts.

In the drawing:

Figure 1 is aside elevation of a device constructed in accordance withmy inven- -p to, so that the circuit from the tion;

lFig. 2 is a and a Fig. 3 is a fragmental detail.

The form of the invention illustrated in the drawing includes a base 1of suitable insulating material, such as porcelain or the like, on whichare mounted twolbinding posts 2 and 3, which are arranged in spacedother and extend above the upper face of the base. A pair of collars eencircle the binding posts 2 and 3 and rest upon the bosses 5 of thebase. Between these collars is interposed the resistance element 6 whichis made, preferably, of carborundum. The ends of this resistance elementare provided with seats 7 to closely fit against the outer faces of thecollars. Lock nuts 8 are mounted on the binding posts above the collars4.. Between the upper edges of the collars and the lock nuts 8,

top plan view' of the same;

a citi- I collars.

terminal block, normally,

7 rent will flow through Specification of Letters Patent Patnted J an,20, 1920,

20, 1919. Serial no. 305,604.

brass washers 9 are interposed, and these washers are of greaterdiameter than the Thus, when the nuts 8 are in their locking positionsand the; carborundum block or resistance element is in place, the

displacement of the element. will be prevented. Binding nuts 10 are alsomounted on the binding posts 2 and 3 and interposed between the lowerends of these nuts and the upper faces of the nuts 8, are a tional brasswashers 11, between which the ddiwires from the line, to the relay andto the. ground are engaged and securely clamped in the usual'manner.

In Fig. 2 of the three of the devices which are arranged in parallel,the grounded terminals 2,bein.1g t

connected together by a conductor 12.

will be readily" realized that the device may be used singly or maysimilar devices if desired.

When a normal voltage is used the curthe line and relay drawing I haveshown be connected tootherwires and .through the binding post to whichthey are attached,

resistance of the carborundum element 6. However, when the voltage isincreased to an abnormal extent, the current will flow through the andwill be grounded through the binding 0st 2 and the ground wire connectedthereline to therelay will be 'protected- Thus it '-.will be seen that Ihave constructed a combination terminal block, and lightning arrester inwhich the resistance the high potential discharges alone, IS inelement,which} permits but the circuit will not be grounded because of the highthereon,

carborundum resistance element 'resist' ance element extending betweenanql andstateof New York, this 22nd day of I aving its ends embracingthe collars, and May, A. 111-1919.. lock nuts on the binding postsarranged to clamp the collars in place anol to'prevelnt I 5 movement ofthe resistance element longi- Witnesses; fsudinally of the loindin'gposts. RUTH SMITH, slg'lned aifin Bufi'alo, in the county of Erie vGEO.'R;R1IX.

Rey CQNNELL.

